Mold for cement building-blocks.



H. F- RIEGE.

MOLD FOR CEMENT BUILDING BLOCKS.

APPLICATION FILED MAYI, l9l2- 1 1 86,039 Patented June 6, 1916.

2 SHEETS-SHEET 1.

H. F. RIEGE. MOLD FOR CEMENT BUILDING BLOCKS.

APPLICATION FILED MAY 1, l9l2.

Patented June 6, 1916.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

HERMAN F. RIEGE, OF ROCHESTER, MINNESOTA.

MOLD FOR CEMENT BUILDING-BLOCKS.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed May 1, 1912. Serial No. 694,419.

vision of a knockdown mold for use in forming building blocks which may be easily and rapidly set up for use and in which the parts may be readily separated to permit theremoval of the block formed therein.

The invention also seeks to provide a mold which will effectually withstand the strains put upon the same in the manufacture of the blocks, and other incidental objects of the invention will appear as the description of the same proceeds.

The invention consists in certain novel features of construction and arrangement of parts which will be hereinafter first fully described and then more particularly pointed out in the claim following the description.

A mold embodying my invention is illus trated in the accompanying drawings, in which:

Figure l is a perspective view of the mold set up for use. Fig. 2 is a central longitudinal section of the same. Fig. 3 is a central transverse section. Fig. at is a detail. perspective view of one of the side plates. Fig. is a similar view of one of the end plates. Fig. 6' is a perspective view of the core. F 7 is a perspective view of the pallet. Fig. 8 is a detail perspective view of one of the stay-bars used to hold the side and end plates in their operative positions.

In carrying out my present invention, I employ a core block consisting of a base -1 and core blanks or formers 2 rising from the said base. In the particular embodiment of the invention illustrated in the drawings, I employ two of these formers which are spaced apart and disposed parallel with each other to extend longitudinally of the base 1. The base is preferably constructed integral with the formers by casting-the preferred material being iron. The base 1 of the core block will be of somewhat greater dimensions than the base of the block to be formed, and a pallet 5, shown in detail in Fig. 7, is intended to fit over the base and around the formers to support the block during its formation and furnish a convenient means ofremoving it, after it hasbeen completed for drying. This pallet is of the same width as the base plate 1, but is longer than the same and is provided at its ends on its.

underside with transverse cleats or stops 6 which are adapted to fit against the ends of the base plate, as shown in Figs. 1 and 2,

and thereby maintain the pallet and the core in their proper relative positions.

The pallet is constructed with longitudinal slots 7 which are adapted to engage the formers 2, so that the pallet may be slipped down over the same and extend over the base plate 1, and upon the upper surface of the pallet, at the sides and between said slots, I. preferably provide the metallic wear-plates 8 which will receive the cement or other plastic material of which the block is formed and prevent the same wearing away the wooden substance of the pallet. Adjacent the ends of the slots 7 but spaced therefrom and in alinement with the slots, sockets or recesses 9 are formed in theupper side of the pallet to be engaged by pins 10 formed on the lower ends of ribs or offsets 11 on V the outer faces of the end-plates or members 1:2. The said end-plates or members 12 are preferably cast-iron and are provided centrally with vertical projections or tongues 14 which are adapted to extend in between the formers 2 of the core, as shown in Fig. 1, whereby recesses or notches will be formed in the ends of the block, so that when the blocks are placed together to form a wall, a ventilating space will be provided through the wall to prevent the collection of dampness within the same. Vertical ribs 15 are also formed on the inner faces of these end members 12 which will cause grooves to be formed in the ends of the block, which grooves will constitute mortar locks when the blocks are formed into a wall.

The end members or plates 12 of the mold are of such a lengththat they will terminate short of the longitudinal edges of the pallet, and the side members'16 rest directly upon the pallet along the longitudinal edges thereof and are provided in their inner faces, adacent their ends, with transverse grooves 17 which receive the ends of the end mem- V bers 12, as shown in Fig. 1, whereby the said side and end members will be held in their proper positions relative to each other and to the core. The end members will fit against the ends of the wear-plates 8, while the side members will fit against the outer edges of the said wear-plates 8, the side members being of cast-iron, like the end members, so that the entire surface exposed to the plastic material, while the block is being formed, will be metal, and consequently the mold will not be quickly worn away. The side members are preferably reinforced on their outer faces with ribs 19 which may be given a somewhat ornamental arrangement and they are also reinforced at their ends with enlarged. projections 20.

In the ends of the side members are horizontal transverse notches or open-ended slots 21 in which are fitted the braces or fastening bars 22 having angular eyes or open heads 23 at one end and being threaded at the opposite end to receive a nut 24;. .Vhen the bars 22 are fitted in the notches 21 of the side members, they will bear firmly against the outer faces of the end members, as shown most clearly in Fig. :2 above the ribs 11, and the nuts 2st are then turned home so as to the inner wall of the opening in the head 23 flush with or slightly within the enlargement 20. edges 25 are then inserted through the said openings and bear against the faces of the enlargements 20, so that when they are driven home the side members will be firmly clamped against the end members and will support the same and also be held together. To prevent loss of these wedges 25, chains or other flexible members 26- are secured to the upper butt ends of the same and to the side members, as clearly shown in Fig. 1.

The manner of using my improved mold, it is thought, will be readily understood.

The pallet is placed over the core in the manner shown and described, and the end members and side. members set up around the formers of the core and rested upon the pallet, as shown, after which the rods or bars 22 are engaged in the end notches 21 of the side members and the wedges 25 driven home so as to firmly secure the parts together. The plastic material is then poured into the space defined by the core and the side and end mold members, and sufficient pressure exerted thereon by tamping to form the plastic mass into a homogeneous body. After the block has been formed, the wedges 25 are released, thereupon permitting the side and end members to be withdrawn from the block. The pallet is then lifted from the base plate of the core, so that the block will be raised out of Copies of this patent may be obtained for five cents each, by addresliag the Commissioner of latent,

engagement with the formers 2, and the block may then be set aside to dry and harden.

The mold is composed of very few parts which are simple in their construction and may be produced at a slight cost. The pins 10 carried by the end members will properly space said members upon the pallet,

block. By fitting the pallet over the formers on the core, movement of the core while the block 13 being formed is prevented and,

at the same time, the removal of the formed block from the core is facilitated, inasmuch as it is necessary merely to lift the pallet from the core until the pallet clears the formers, reversing of the mold being rendered unnecessary.

Having thus described my invention, what I claim is A mold for forming building blocks of concrete or plastic material, the same comprising a pallet having openings near its ends, inclosing end and side members mounted on the pallet and interlocking at or near their ends, the side members having open slots at their ends exterior to the end members, and the end members having exterior ribs with their lower ends projecting below the lower edges of the end members and entering the openings of the pallet, the upper ends of the ribs terminating in line with the open slots formed in the ends of the side members, and tie bars extending along the outer faces of the end members and in contact with the upper ends of the ribs thereof and having their ends passing,

through the open slots of the side members.

In testimony whereof I ailix my signature in presence of two witnesses.

Washington, D. C." 

